Description: Bright to Keep Your Safe: 360 degree wide angle visual design provides more visibility than other lights.what's more , The COB lamp beads produces super bright light to enhance maximum visibility on the road for your cycling safety. Multiple Modes & Waterproof: lasting up to 2-4 hours depending on the mode you use. Weather tight design ensures all condition use. USB Rechargeable: Stop Wasting Your Money and Never Buy Batteries. The bicycle tail light charges from your computer or any devices with USB port.Only takes 2 hours to fully charge. Easy to Install: Horizontal or Vertical Mounting, 360 rotation mountable cycling blinker installs and flexible detaches around any handlebars, seat post, frame or helmet in seconds with no tools required. What You Get:1 x Bicycle Tail Light, 1 x Rubber Strap, 1 x USB Cable. Specification: Material: Shell PC Power: 1w High-power COB lamp beads Power supply: built-in 500mAh lithium battery Charging time: 2 hours Protection level: IP43 Luminous flux: red light 151m blue light 10m Temperature range: -10C~50C Size Chart: 87x20x30mm/3.43x0.79x1.18inch Package Includes: 1 Piece Bicycle Tail Light 1 Piece Rubber Strap 1 Piece USB Cable Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!